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Search: id:A074865
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A074865 a(n) = a(n-1) + R[a(n-2)] + R[a(n-3)] + R[a(n-4)] where a(0) = a(1) = a(2) = a(3) = 1 and R(n) (A004086) is the reverse of n. +0
1
1, 1, 1, 1, 4, 7, 13, 25, 67, 157, 316, 1195, 2635, 9910, 21796, 33268, 108541, 264685, 566431, 1384927, 2251855, 10267813, 23278831, 68031385, 119376340, 223452859, 339327088, 1399568407, 3282220573, 12169858759, 23849465446, 130434244321 (list; graph; listen)
OFFSET

1,5

CROSSREFS

Cf. A000288.

Sequence in context: A118334 A004119 A074864 this_sequence A072683 A122552 A074862

Adjacent sequences: A074862 A074863 A074864 this_sequence A074866 A074867 A074868

KEYWORD

easy,base,nonn

AUTHOR

Felice Russo (felice.russo(AT)katamail.com), Sep 11 2002

EXTENSIONS

Corrected and extended by Michel ten Voorde (seqfan(AT)tenvoorde.org) Jun 13 2003

More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 08 2006

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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