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 A265209 Irregular triangle read by rows in which row n lists the base-3 digits of 2^n, n >= 0. 2
 1, 2, 1, 1, 2, 2, 1, 2, 1, 1, 0, 1, 2, 2, 1, 0, 1, 1, 1, 2, 0, 2, 1, 0, 0, 1, 1, 1, 2, 0, 0, 2, 2, 2, 1, 1, 0, 1, 2, 2, 1, 2, 2, 1, 0, 2, 1, 2, 1, 2, 1, 2, 1, 2, 0, 1, 1, 0, 2, 0, 2, 0, 1, 0, 2, 2, 1, 1, 1, 1, 0, 2, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1, 2, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS The length of row n is A020915(n) = 1 + A136409(n). LINKS EXAMPLE Triangle begins:   1   2   1  1   2  2   1  2  1   1  0  1  2   2  1  0  1   1  1  2  0  2   1  0  0  1  1  1   2  0  0  2  2  2   1  1  0  1  2  2  1   2  2  1  0  2  1  2   1  2  1  2  1  2  0  1   1  0  2  0  2  0  1  0  2   2  1  1  1  1  0  2  1  1   1  1  2  2  2  2  1  1  2  2 MATHEMATICA (* Replace Flatten with Grid to display the triangle: *) Flatten[Table[IntegerDigits[2^n, 3], {n, 0, 15}]] PROG (PARI) for(n=0, 15, for(k=1, #digits(2^n, 3), print1(digits(2^n, 3)[k], ", "))) \\ Derek Orr, Dec 24 2015 CROSSREFS Cf. A000079 (powers of 2), A003137, A004642 (powers of 2 written in base 3). Cf. A265210 (base 3 digits of 2^n in reverse order). Sequence in context: A176261 A264837 A264714 * A202340 A049705 A060236 Adjacent sequences:  A265206 A265207 A265208 * A265210 A265211 A265212 KEYWORD nonn,tabf,base AUTHOR L. Edson Jeffery, Dec 04 2015 STATUS approved

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Last modified January 21 21:30 EST 2020. Contains 331128 sequences. (Running on oeis4.)