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A302351 Hyper-Wiener index of body-centered cubic grid cells in a row. 1
92, 377, 1128, 2700, 5548, 10277, 17392, 27798, 42300, 61853, 87512, 120432, 161868, 213175, 275808, 351322, 441372, 547713, 672200, 816788, 983532, 1174587, 1392208, 1638750, 1916668, 2228517, 2576952, 2964728, 3394700, 3869823, 4393152, 4967842 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Colin Barker, Table of n, a(n) for n = 1..1000

Hamzeh Mujahed, Benedek Nagy, Hyper-Wiener Index on Rows of Unit Cells of the BCC Grid, Comptes rendus de l’Académie bulgare des Sciences, Tome 71, No 5, 2018, 675-684.

Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-5,1).

FORMULA

a(n) = (25*n^4 + 105*n^3 + 143*n^2 + 171*n + 108)/6 (proven).

From Colin Barker, Jun 11 2018: (Start)

G.f.: x*(92 - 83*x + 163*x^2 - 90*x^3 + 18*x^4 + 50*x^5 - 250*x^6 + 500*x^7 - 500*x^8 + 250*x^9 - 50*x^10) / (1 - x)^5.

a(n) = 5*a(n-1) - 10*a(n-2) + 10*a(n-3) - 5*a(n-4) + a(n-5) for n>11.

(End)

PROG

(PARI) Vec(x*(92 - 83*x + 163*x^2 - 90*x^3 + 18*x^4 + 50*x^5 - 250*x^6 + 500*x^7 - 500*x^8 + 250*x^9 - 50*x^10) / (1 - x)^5 + O(x^40)) \\ Colin Barker, Jun 11 2018

CROSSREFS

Sequence in context: A063326 A185461 A246802 * A100169 A100170 A233311

Adjacent sequences:  A302348 A302349 A302350 * A302352 A302353 A302354

KEYWORD

nonn

AUTHOR

Benedek Nagy, Jun 09 2018

STATUS

approved

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Last modified December 13 20:27 EST 2019. Contains 329973 sequences. (Running on oeis4.)