A255616 Table read by antidiagonals, T(n,k) = floor(sqrt(k^n)), n >= 0, k >=1.

1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 2, 3, 2, 1, 1, 2, 4, 5, 4, 1, 1, 2, 5, 8, 9, 5, 1, 1, 2, 6, 11, 16, 15, 8, 1, 1, 2, 7, 14, 25, 32, 27, 11, 1, 1, 3, 8, 18, 36, 55, 64, 46, 16, 1, 1, 3, 9, 22, 49, 88, 125, 128, 81, 22, 1, 1, 3, 10, 27, 64, 129, 216, 279, 256, 140, 32, 1, 1, 3, 11, 31, 81, 181, 343, 529, 625, 512, 243, 45, 1

Offset

0,9

Links

G. C. Greubel, Table of n, a(n) for the first 100 antidaigonals, flattened

Kival Ngaokrajang, Example of table T(n,k), n = 0..12, k = 1..10

Formula

T(n,k) = floor(sqrt(k^n)), n >= 0, k >=1.

Example

See table in the links.

Mathematica

T[n_, k_] := Floor[Sqrt[k^n]]; Table[T[k, n + 1 - k], {n, 0, 15}, {k, 0, n}] (* G. C. Greubel, Dec 30 2017 *)

Prog

(PARI) {for(i=1, 13, for(n=0, i-1, a=sqrtint((i-n)^n); print1(a, ", ")))}

Crossrefs

Rows(1..10): A000012, A000196, A000027, A000093, A000290, A155013, A000578, A155014, A000583, A238170.

Columns(1..10): A000012, A017910, A017913, A000079, A017919, A017922, A017925, A017928, A000244, A017934.

Diagonals: A190343, A066642, A075264.

Sequence in context: A080345 A285202 A004737 * A014600 A165475 A341456

Adjacent sequences: A255613 A255614 A255615 * A255617 A255618 A255619

Keyword

nonn,tabl,easy

Author

Kival Ngaokrajang, Feb 28 2015

Extensions

Terms a(81) onward added by G. C. Greubel, Dec 30 2017

Status

approved