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 A272011 Irregular triangle read by rows: strictly decreasing sequences of nonnegative numbers given in lexicographic order. 4
 0, 1, 1, 0, 2, 2, 0, 2, 1, 2, 1, 0, 3, 3, 0, 3, 1, 3, 1, 0, 3, 2, 3, 2, 0, 3, 2, 1, 3, 2, 1, 0, 4, 4, 0, 4, 1, 4, 1, 0, 4, 2, 4, 2, 0, 4, 2, 1, 4, 2, 1, 0, 4, 3, 4, 3, 0, 4, 3, 1, 4, 3, 1, 0, 4, 3, 2, 4, 3, 2, 0, 4, 3, 2, 1, 4, 3, 2, 1, 0, 5, 5, 0, 5, 1, 5, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 COMMENTS Length of n-th row given by A000120(n); Maximum of n-th row given by A000523(n); Minimum of n-th row given by A007814(n); GCD of n-th row given by A064894(n); Sum of n-th row given by A073642(n + 1). n-th row begins at index A000788(n - 1) for n > 0. The first appearance of n is at A001787(n). a(A001787(n) + 1) = a(A001787(n)) for all n > 0. a(A001787(n) + 2) = 0 for all n > 0. a(A001787(n) + 3) = a(A001787(n)) for all n > 1. a(A001787(n) + 4) = 1 for all n > 1. a(A001787(n) + 5) = a(A001787(n)) for all n > 1. Row n < 1024 lists the digits of A262557(n). - M. F. Hasler, Dec 11 2019 LINKS Peter Kagey, Table of n, a(n) for n = 0..10000 EXAMPLE Row n is given by the exponents in the binary expansion of n. For example, row 5 = [2, 0] because 5 = 2^2 + 2^0. Row 0: [] Row 1: [0] Row 2: [1] Row 3: [1, 0] Row 4: [2] Row 5: [2, 0] Row 6: [2, 1] Row 7: [2, 1, 0] PROG (PARI) apply( A272011_row(n)=Vecrev(vecextract([0..exponent(n+!n)], n)), [0..39]) \\ For n < 2^10: row(n)=digits(A262557[n]). There are 2^k rows starting with k, they start at row 2^k. - M. F. Hasler, Dec 11 2019 CROSSREFS Cf. A000120, A000523, A001787, A007814, A064894, A073642. Cf. A133457 gives the rows in reverse order. Cf. A272020, A262557. Sequence in context: A319954 A050949 A074943 * A236374 A045719 A114906 Adjacent sequences:  A272008 A272009 A272010 * A272012 A272013 A272014 KEYWORD nonn,tabf AUTHOR Peter Kagey, Apr 17 2016 STATUS approved

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Last modified January 22 16:37 EST 2020. Contains 331152 sequences. (Running on oeis4.)