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Search: id:A074863
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| A074863 |
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a(n) = a(n-1) + a(n-2) + 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. |
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1
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| 1, 1, 1, 1, 4, 7, 13, 25, 49, 94, 199, 394, 781, 1423, 3589, 6286, 11485, 24601, 52225, 95137, 230374, 388378, 766114, 1458025, 3085549, 6183571, 11138812, 25616473, 52394659, 90903760, 190798003, 371558074, 748909162, 1317996148, 2739360475, 5277120958
(list; graph; listen)
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OFFSET
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0,5
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LINKS
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N. J. A. Sloane, Transforms
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MAPLE
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read transforms; A074863 := proc(n) option remember; local i, j, k, t1; if n <= 3 then 1 else A074863(n-1)+A074863(n-2)+A074863(n-3)+digrev(A074863(n-4)); fi; end;
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CROSSREFS
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Cf. A000288.
Adjacent sequences: A074860 A074861 A074862 this_sequence A074864 A074865 A074866
Sequence in context: A090854 A039694 A000288 this_sequence A118334 A004119 A074864
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KEYWORD
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easy,base,nonn
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AUTHOR
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Felice Russo (felice.russo(AT)katamail.com), Sep 11 2002
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EXTENSIONS
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Corrected and extended by David Garber (garber(AT)math.huji.ac.il), Oct 23 2002
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