The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A348685 Triangle read by rows, T(n, k) = 2^(2*n - HammingWeight(k)), for 0 <= k <= n. 4
 1, 4, 2, 16, 8, 8, 64, 32, 32, 16, 256, 128, 128, 64, 128, 1024, 512, 512, 256, 512, 256, 4096, 2048, 2048, 1024, 2048, 1024, 1024, 16384, 8192, 8192, 4096, 8192, 4096, 4096, 2048, 65536, 32768, 32768, 16384, 32768, 16384, 16384, 8192, 32768 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS EXAMPLE Triangle starts: [0] 1; [1] 4,      2; [2] 16,     8,      8; [3] 64,     32,     32,     16; [4] 256,    128,    128,    64,    128; [5] 1024,   512,    512,    256,   512,    256; [6] 4096,   2048,   2048,   1024,  2048,   1024,  1024; [7] 16384,  8192,   8192,   4096,  8192,   4096,  4096,  2048; [8] 65536,  32768,  32768,  16384, 32768,  16384, 16384, 8192,  32768; [9] 262144, 131072, 131072, 65536, 131072, 65536, 65536, 32768, 131072, 65536; MAPLE HammingWeight := n -> add(i, i = convert(n, base, 2)): A348685 := (n, k) -> 2^(2*n - HammingWeight(k)): seq(seq(A348685(n, k), k = 0..n), n = 0..8); MATHEMATICA Table[2^(2*n - DigitCount[k, 2, 1]), {n, 0, 8}, {k, 0, n}] // Flatten (* Amiram Eldar, Oct 30 2021 *) CROSSREFS Cf. A000120, A000079, A000302, A046161. Cf. A348684, A348687, A348676. Sequence in context: A302213 A090881 A191452 * A110485 A240988 A154383 Adjacent sequences:  A348682 A348683 A348684 * A348686 A348687 A348688 KEYWORD nonn,tabl AUTHOR Peter Luschny, Oct 29 2021 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified January 28 11:15 EST 2022. Contains 350655 sequences. (Running on oeis4.)