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A061456
Binary representation of a(n) corresponds to "ana"-sequence.
0
1, 5, 357, 93768037, 1689174798555184371255653, 9874926935306000254499942419184958425482775497556872534778412080951642469
OFFSET
1,2
COMMENTS
Encoding 'ana'/'121' = 1 and 'ann'/'122' = 2 results again in A060032 (left shifted).
EXAMPLE
a(3)= 357= 256+64+32+4+1= '101,100,101' (base 2), A060032(3)= '121,122,121'.
CROSSREFS
KEYWORD
eigen,nonn
AUTHOR
Frank Ellermann, Jun 11 2001
STATUS
approved