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 A212774 Amounts (in cents) of coins in denominations 1, 5, 10, 25, and 50 (cents) which, when using the minimal number of coins, have equal numbers of all denominations used. 4
 0, 1, 2, 3, 4, 5, 6, 10, 11, 15, 16, 20, 22, 25, 26, 30, 31, 35, 36, 40, 41, 50, 51, 55, 56, 60, 61, 65, 66, 75, 76, 80, 81, 85, 86, 90, 91, 100, 102, 120, 122, 150, 153, 200, 204, 250, 300, 350, 400, 450, 500, 550, 600, 650, 700, 750, 800, 850, 900, 950 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Nonnegative integers representable as a linear combination of 1, 5, 10, 25, and 50 with nonnegative coefficients, minimal sum of coefficients, and all nonzero coefficients equal. Includes all nonnegative multiples of 50 and every term > 204 is a multiple of 50. Unlike A212773, here it is permitted--and necessary--to use a single denomination for some amounts; otherwise, this sequence would be finite. LINKS FORMULA a(n) = (n-41)*50 for n >= 46. EXAMPLE a(37) = 91 is a term because the minimal number of coins to equal the amount 91 is five, 91 = 1*1 + 1*5 + 1*10 + 1*25 + 1*50, and there is one of each of the five denominations used. a(45) = 204 is a term because the minimal number of coins for 204 is eight, 204 = 4*1 + 4*50, and there are four of each of the two denominations used. Although 12 can be represented as 12*1 or 2*1 + 2*5, requiring 12 or 4 coins and each otherwise meeting the criteria, three (2*1 + 1*10) is the minimal number of coins required and 2 does not equal 1, so 12 is not a term. CROSSREFS Cf. A212773, A011542, A001300. Sequence in context: A032902 A018578 A056910 * A131934 A066501 A199191 Adjacent sequences:  A212771 A212772 A212773 * A212775 A212776 A212777 KEYWORD nonn AUTHOR Rick L. Shepherd, May 29 2012 STATUS approved

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Last modified July 2 09:21 EDT 2020. Contains 335398 sequences. (Running on oeis4.)