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 A271709 Table T(n,k) = 2^n + 2^k read by antidiagonals. 2
 2, 3, 3, 5, 4, 5, 9, 6, 6, 9, 17, 10, 8, 10, 17, 33, 18, 12, 12, 18, 33, 65, 34, 20, 16, 20, 34, 65, 129, 66, 36, 24, 24, 36, 66, 129, 257, 130, 68, 40, 32, 40, 68, 130, 257, 513, 258, 132, 72, 48, 48, 72, 132, 258, 513, 1025, 514, 260, 136, 80, 64, 80, 136 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS n > 1 is in this sequence if and only if it is in A018900 or A000079. LINKS Peter Kagey, Table of n, a(n) for n = 0..10000 FORMULA T(n,k) = T(k,n) = A173786(n,k). - R. J. Mathar, Apr 15 2016 EXAMPLE a(0) = T(0, 0) = 2^0 + 2^0 = 2 a(1) = T(1, 0) = 2^1 + 2^0 = 3 2, 3, 5, 9, 17, 33, 65, 129, 257, 513,1025, 3, 4, 6, 10, 18, 34, 66, 130, 258, 514,1026, 5, 6, 8, 12, 20, 36, 68, 132, 260, 516,1028, 9, 10, 12, 16, 24, 40, 72, 136, 264, 520,1032, 17, 18, 20, 24, 32, 48, 80, 144, 272, 528,1040, 33, 34, 36, 40, 48, 64, 96, 160, 288, 544,1056, 65, 66, 68, 72, 80, 96, 128, 192, 320, 576,1088, 129, 130, 132, 136, 144, 160, 192, 256, 384, 640,1152, 257, 258, 260, 264, 272, 288, 320, 384, 512, 768,1280, 513, 514, 516, 520, 528, 544, 576, 640, 768,1024,1536, 1025,1026,1028,1032,1040,1056,1088,1152,1280,1536,2048, MAPLE A271709 := proc(n, k) 2^n+2^k ; end proc: # R. J. Mathar, Apr 15 2016 MATHEMATICA Table[2^(n - k) + 2^k, {n, 0, 10}, {k, 0, n}] // Flatten (* Michael De Vlieger, Apr 12 2016 *) PROG (PARI) T(n, k) = 2^n + 2^k; matrix(10, 10, n, k, n--; k--; T(n, k)) \\ Michel Marcus, Apr 12 2016 CROSSREFS Cf. A173786, A271710. Sequence in context: A116922 A086898 A123031 * A369172 A359042 A159070 Adjacent sequences: A271706 A271707 A271708 * A271710 A271711 A271712 KEYWORD nonn,tabl,easy AUTHOR Peter Kagey, Apr 12 2016 STATUS approved

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Last modified April 16 04:38 EDT 2024. Contains 371696 sequences. (Running on oeis4.)