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A105527 Index when n-nacci (tribonacci etc.) passes Fibonacci numbers. 1
3, 4, 6, 9, 11, 14, 16, 19, 22, 25, 27, 30, 33, 36, 39, 42, 45, 48, 51, 54, 57, 60, 63, 67, 70, 73, 76, 79, 82, 85, 88, 91, 95, 98, 101, 104, 107, 110, 113, 117, 120, 123, 126, 129, 132, 136, 139, 142, 145, 148, 151, 155, 158, 161, 164, 167, 171, 174, 177, 180, 183, 186 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

COMMENTS

The n-nacci sequences are considered as defined in A000213, A000288, A000322, A000383 for n=3,4,5,6, respectively.

LINKS

Table of n, a(n) for n=3..64.

EXAMPLE

a(3)=3 because tribonacci(3)=3 while fibonacci(3)=2;

a(6)=9 because hexanacci(9)=41 while fibonacci(9)=34.

PROG

(PARI) {n_bonacci(n, v)= local(x, l); l=matsize(v)[2]; x=0; for(i=l-n+1, l, x+=v[i]); return(x)} {nbg(k)= local(q=[], l, v, m); for(n=3, k, v=[]; for(i=1, n, v=concat(v, 1)); m=n; while((x=n_bonacci(n, v))<=fibonacci(m), v=concat(v, x); m+=1); q=concat(q, m)); return(q) }

CROSSREFS

Cf. A105528, A000045, A000213, A000288, A000322, A000383.

Sequence in context: A034027 A184795 A285412 * A094345 A243302 A301654

Adjacent sequences:  A105524 A105525 A105526 * A105528 A105529 A105530

KEYWORD

easy,nonn

AUTHOR

Ferenc Adorjan (fadorjan(AT)freemail.hu), Apr 11 2005

STATUS

approved

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Last modified August 20 07:48 EDT 2019. Contains 326143 sequences. (Running on oeis4.)