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A135688 a(1)=a(2)=1; a(n) = A004001(n)*a(n-1) + a(n-2) for n > 2. 1
1, 1, 3, 7, 24, 103, 436, 1847, 9671, 59873, 428782, 3061347, 24919558, 202417811, 1644262046, 13356514179, 121852889657, 1231885410749, 13672592407896, 165302994305501, 1997308524073908, 26130313807266305, 367821701825802178 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

G. C. Greubel, Table of n, a(n) for n = 1..500

MATHEMATICA

Clear[Conway, a]; (*A004001*) Conway[1] = Conway[2] = 1; Conway[n_Integer?Positive] :=Conway[n] =Conway[Conway[n - 1]] + Conway[n - Conway[n - 1]]; a[1] = 1; a[2] = 1; a[n_] := a[n] = Conway[n]*a[n - 1] + a[n - 2]; Table[a[n], {n, 1, 50}]

CROSSREFS

Cf. A004001.

Sequence in context: A176606 A007172 A027610 * A252785 A229039 A005642

Adjacent sequences:  A135685 A135686 A135687 * A135689 A135690 A135691

KEYWORD

nonn

AUTHOR

Roger L. Bagula, Feb 19 2008

EXTENSIONS

Edited and corrected by Eric M. Schmidt, Dec 21 2014

STATUS

approved

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Last modified July 16 04:26 EDT 2019. Contains 325064 sequences. (Running on oeis4.)