A133392 Start with a(1)=1; for n >= 1, a(n+1)=a(n)+a(k) with k=[n-n-th digit of "e"]. If k<0 or k=0, then a(k)=0.

1, 1, 1, 2, 2, 3, 3, 6, 6, 9, 10, 13, 16, 18, 36, 46, 56, 92, 128, 146, 202, 238, 476, 678, 724, 816, 1054, 1200, 2254, 3070, 3794, 6048, 6864, 7918, 13966, 17760, 18814, 21884, 25678, 33596, 40460, 66138, 88022, 105782, 211564, 229324, 317346, 357806

Offset

1,4

Comments

Terms of this "eBonacci sequence" computed by Gilles Sadowski.

Links

Gilles Sadowski, Table of n, a(n) for n = 1..101

Example

For n=7 we have a(8)=a(7)+a(k) with k=(7-1) [because "1" is the 7th digit of "e": 2,7,1,8,2,8,(1),8,2,...] So a(8)=a(7)+a(6)=3+3=6

Crossrefs

Sequence in context: A168659 A035642 A213332 * A101199 A032155 A116932

Adjacent sequences: A133389 A133390 A133391 * A133393 A133394 A133395

Keyword

base,easy,nonn

Author

Eric Angelini, Nov 23 2007

Status

approved