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A112638
Power each digit individually according to its position and add the numbers.
0
2, 4, 16, 46, 196, 946, 8296, 65246, 385596, 1568346, 3925096, 17165846, 59491596, 333414346, 1000627096, 1003689846, 1013327596, 1019992346, 1099915096, 1899135846, 8291221596, 65211444346, 385412777096, 1566619439846, 3899692777596
OFFSET
1,1
COMMENTS
As the sequence tends to infinity the value of the least significant digit is always 6. The next digit is 4 or 9.
EXAMPLE
a(1) = 2.
a(2) = 2^2 = 4.
a(3) = 4^2 = 16.
a(4) = 1^2 *10 + 6^2 = 10 + 36 = 46.
a(5) = 4^2 *10 + 6^2 = 160 + 36 = 196.
a(6) = 1^2 *100 + 9^2 *10 + 6^2 = 100 + 810 +36 = 946.
PROG
(PARI) modN(n) = { local(resul, nshif, d) ; nshif = n; d = 0 ; resul = 0 ; while(nshif > 0, resul += 10^d* ((nshif % 10)^2) ; d++ ; nshif = floor(nshif/10) ; ) ; return(resul) ; }
{ an=2 ; print(an, ", ") ; for (n = 2, 30, an=modN(an) ; print(an, ", ") ; ) } \\ R. J. Mathar, Mar 15 2006
CROSSREFS
Sequence in context: A148279 A101061 A148280 * A077162 A128903 A103435
KEYWORD
nonn,base
AUTHOR
Jorge Coveiro, Dec 27 2005
EXTENSIONS
More terms from R. J. Mathar, Mar 15 2006
STATUS
approved