A185870 - OEIS

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A185870

(Even,odd)-polka dot array in the natural number array A000027, by antidiagonals.

3, 8, 10, 17, 19, 21, 30, 32, 34, 36, 47, 49, 51, 53, 55, 68, 70, 72, 74, 76, 78, 93, 95, 97, 99, 101, 103, 105, 122, 124, 126, 128, 130, 132, 134, 136, 155, 157, 159, 161, 163, 165, 167, 169, 171, 192, 194, 196, 198, 200, 202, 204, 206, 208, 210, 233, 235, 237, 239, 241, 243, 245, 247, 249, 251, 253, 278, 280, 282, 284, 286, 288, 290, 292, 294, 296, 298, 300, 327, 329, 331, 333, 335, 337, 339, 341, 343, 345, 347, 349, 351, 380, 382, 384, 386, 388, 390, 392, 394, 396, 398, 400, 402, 404, 406

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

This is the third of four polka dot arrays in the array A000027. See A185868.

row 1: A033816

col 1: A014105

col 2: -A168244

antidiagonal sums: A061317

antidiagonal sums: 3*(octahedral numbers) = 3*A005900.

LINKS

G. C. Greubel, Table of n, a(n) for the first 50 rows, flattened