gracefu:C gracefu$ ./recur7 20
Initializing...
1	1	2	4	7	12	21	37	65	114	200	351	616	1081	1897	3329	5842	10252	17991	31572
Attempting to create 73395 big ints
Initialization took: 0.013949
Performing calculation...
1: 1048576
2: 393620574951
3: 188511468667167977
4: 85208370018819516579840
5: 39049008711957939499430912279
6: 17836713097772053944789975297234441
7: 8153768048014584940708939760267050633216
8: 3726672826935620792045363935504192058803771535
9: 1703347939359914455191399817639020500175376703279249
10: 778539952575707557906192400959008703522338735917097302016
11: 355843900988546509692102822184907842407831587960733841037275423
12: 162643941347612539087001118861377087136213203321548862442248392549969
13: 74338931588584954440308621606889178628862523889177022352425447986531700736
14: 33977758514556072249560228542440553879040013607080192630276676824517277465975287
15: 15530060202551792992980493206384971115034306234911237753806900468679606081581080523129
16: 7098254269168068525460355077751867299247502287553046162397051497967727848806836861498007552
17: 3244366926824665677345739848816182280838252401634316398092780984039591518748636293764234518795239
18: 1482888095520917716771367999758347046955795466022541044972686721613611087283919487607097574863329606873
19: 677776944929817738849179056223891882019073051951075424906863896573934574414045353845074853162865049676834816
20: 309788438158707787946209693584485878893827503451871719323355806972771988355120437940339766324680062978054435939103
Time taken: 4.60971