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A063462 n * last digit of n. 2
0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 0, 11, 24, 39, 56, 75, 96, 119, 144, 171, 0, 21, 44, 69, 96, 125, 156, 189, 224, 261, 0, 31, 64, 99, 136, 175, 216, 259, 304, 351, 0, 41, 84, 129, 176, 225, 276, 329, 384, 441, 0, 51, 104, 159, 216, 275, 336, 399, 464, 531, 0, 61, 124 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Harry J. Smith, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (0,0,0,0,0,0,0,0,0,2,0,0,0,0,0,0,0,0,0,-1).

FORMULA

G.f.: x*(9*x^18 +16*x^17 +21*x^16 +24*x^15 +25*x^14 +24*x^13 +21*x^12 +16*x^11 +9*x^10 +81*x^8 +64*x^7 +49*x^6 +36*x^5 +25*x^4 +16*x^3 +9*x^2 +4*x +1) / ((x -1)^2*(x +1)^2*(x^4 -x^3 +x^2 -x +1)^2*(x^4 +x^3 +x^2 +x +1)^2). - Colin Barker, Feb 07 2014

MATHEMATICA

Table[n NumberDigit[n, 0], {n, 0, 70}] (* Requires Mathematica version 12 or later *) (* Harvey P. Dale, Jul 06 2021 *)

PROG

(PARI) a(n)=n%10*n; j=[]; for(n=0, 200, j=concat(j, a(n))); j

(PARI) { for (n=0, 1000, write("b063462.txt", n, " ", n%10*n) ) } \\ Harry J. Smith, Aug 22 2009

CROSSREFS

Sequence in context: A115300 A085942 A066308 * A098736 A002015 A257587

Adjacent sequences:  A063459 A063460 A063461 * A063463 A063464 A063465

KEYWORD

base,easy,nonn

AUTHOR

Jason Earls, Jul 26 2001

STATUS

approved

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Last modified November 27 07:28 EST 2021. Contains 349365 sequences. (Running on oeis4.)