|
Search: id:A074863
|
|
|
| A074863 |
|
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. |
|
+0
1
|
|
| 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)
|
|
|
OFFSET
|
0,5
|
|
|
LINKS
|
N. J. A. Sloane, Transforms
|
|
MAPLE
|
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;
|
|
CROSSREFS
|
Cf. A000288.
Sequence in context: A090854 A039694 A000288 this_sequence A118334 A004119 A074864
Adjacent sequences: A074860 A074861 A074862 this_sequence A074864 A074865 A074866
|
|
KEYWORD
|
easy,base,nonn
|
|
AUTHOR
|
Felice Russo (felice.russo(AT)katamail.com), Sep 11 2002
|
|
EXTENSIONS
|
Corrected and extended by David Garber (garber(AT)math.huji.ac.il), Oct 23 2002
|
|
|
Search completed in 0.006 seconds
|
